Improvement in saw-wiills



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`Improvement i'n Saw-Mills'.

NG. 126,843; I PatntedMay14,1872.

Nrrnn JOHN H. SMITH, OF SHELL MOUND, MISSISSIPPI.

IMPROVEMENT IN SAW-MILLS.

To all whom 'it may concern.-

Beit known that I, JOHN H. SMITH, of Shell Mound, in the county ofSundowe'r and in the State of Mississippi, have invented certain new anduseful Improvements in Saw-Mills; and do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawing and to the letters of referencemarked thereon making a part of this specification.

The nature of my invention consists in the construction and arrangementof certain devices, which will be hereinafter described, for runningtwosaws in the same time and in the same direction by means of one belt,and regulating the same, as will be set forth.

In the annexed drawing, of which Figure I is a side elevation and Fig. 2a plan view, A represents the frame of the machine, which is constructedin any usual and substantial manner. E represents a shaft, which liescrosswise of the frame, and having its bearings in it. This shaftcarries a pulley or drum near its center`- and a circular saw on oneend. Gonnected to the main frame is a movable framework composed of thecurved supports B, the box H, and the guide-bars B B. D represents ashaft, which carries a circular saw on its outer end above the saw onshaft E, and which has its bearings in the box H. This shaft is providedalso with a drum or pulley and a clutchpulley. This clutch-pulley isoperated by a suitable lever for that purpose. The box H is notpermanently secured to the vcurved supports B, but by means of slots andset-screws, whereby the distance between the saws can be changed byraising or lowering said box. The guide-bars B B are secured or madefast to the supports B, and embrace between them a sliding pulley-box,G. Within the pulley-box is a pulley, F. G represents .a belt, whichpasses around the pulley on shaft E; then around the pulley F; thenaround the pulley on shaft D; and thence around the drivingpulley, whichmoves the saws. By this arrangement the two saws are driven in the samedirection and at the same speed. The sliding pulley-box Gr is movedbetween the guides B by means of the set-screw d, and thus the tensionof the belt is regulated.

Great trouble has been' experienced in the use of two belts for two sawsbecause where the tension of one is greater than that of the other, andone saw is allowed to partially stop its work while the other is cuttingstrongly, the saw of the loose belt will necessarily be broken topieces.

By this arrangement both saw-belts have the same tension, and there cannever be any danger of breaking or damaging either from.

the cause mentioned.

The supports B B are capable of adjustment on the frame A by means ofslots and setscrews at J J. The object of this adjustment is to governthe angle of the saw while at work.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

, The construction and arrangement of the curved support B, adjustablebox H, and guidebars B with the pulley-box C and the belt Gr, allconstructed and operating substantially as and for the purpose setforth.

In testimony that I claim the foregoing I have hereunto set my hand this20th day of March, 1872.

JOHN H. SMITH. Witnesses:

C. M. ALEXANDER, J. M. MAsoN.

